UI

The Airflow UI is the web interface served by the Web Server — where you view DAG runs, inspect individual task state, read logs, and trigger or clear runs by hand.

Views used most often:

• Grid view — a run history matrix of DAGs vs. task instances, colored by status
• Graph view — the DAG’s dependency graph, useful for seeing what’s blocking what
• Logs — per-task-instance stdout/stderr, the first place to look when a task fails
• Trigger DAG — manually kick off a run outside its normal schedule

See also: Web Server, DAG